分类 wifidog源码 下的文章

wifidog配置中文说明

#网关ID
GatewayID default
#外部网卡
ExternalInterface eth0
#无线网卡
GatewayInterface eth0
#无线IP
GatewayAddress 192.168.1.1
#路由状态HTML
HtmlMessageFile wifidog-msg.html 
#验证服务器
#AuthServer {
#    Hostname                 (Mandatory; Default: NONE)
#    SSLAvailable             (Optional; Default: no; Possible values: yes, no)
#    SSLPort                  (Optional; Default: 443)
#    HTTPPort                 (Optional; Default: 80)
#    Path                     (Optional; Default: /wifidog/ Note:  The path must be both prefixed and suffixed by /.  Use a single / for server root.)
#   LoginScriptPathFragment  (Optional; Default: login/? Note:  未用户登录重定向地址.)
#   PortalScriptPathFragment (Optional; Default: portal/? Note:  登录成功后重定向地址.)
#   MsgScriptPathFragment    (Optional; Default: gw_message.php? Note:  退出登录后重定向地址.)
#   PingScriptPathFragment    (Optional; Default: ping/? Note:  路由状态心跳地址.)
#   AuthScriptPathFragment    (Optional; Default: auth/? Note:  路由请求服务器验证地址 and 验证心跳地址(stage=counters).)
#}

AuthServer {
    Hostname auth.com
    #SSLAvailable yes
    Path /
}

# 是否后台进程
# Daemon 1
#默认网关端口
# Default: 2060
GatewayPort 80

# HTTP进程名
# HTTPDName WiFiDog

# HTTP最大连接数
# Default: 10
# HTTPDMaxConn 10

# WEB页面加密码后显示名
# Default: WiFiDog
# HTTPDRealm WiFiDog

# WEB加验证
# HTTPDUserName admin
# HTTPDPassword secret

# 心跳间隔时间
# Default: 60
CheckInterval 60

# 心跳间隔次数 验证超时数等于 CheckInterval*ClientTimeout 
ClientTimeout 2

# 信任的MAC地址,加入信任列表将不用登录可访问
#TrustedMACList 00:00:DE:AD:BE:AF,00:00:C0:1D:F0:0D

#其他防火墙设置

#全局
FirewallRuleSet global {
    ## To block SMTP out, as it's a tech support nightmare, and a legal liability
    #FirewallRule block tcp port 25

    ## Use the following if you don't want clients to be able to access machines on 
    ## the private LAN that gives internet access to wifidog.  Note that this is not
    ## client isolation;  The laptops will still be able to talk to one another, as
    ## well as to any machine bridged to the wifi of the router.
    # FirewallRule block to 192.168.0.0/16
    # FirewallRule block to 172.16.0.0/12
    # FirewallRule block to 10.0.0.0/8

    ## This is an example ruleset for the Teliphone service.
    #FirewallRule allow udp to 69.90.89.192/27
    #FirewallRule allow udp to 69.90.85.0/27
    #FirewallRule allow tcp port 80 to 69.90.89.205
}

# 新验证用户
FirewallRuleSet validating-users {
    FirewallRule allow to 0.0.0.0/0
}

#正常用户
FirewallRuleSet known-users {
    FirewallRule allow to 0.0.0.0/0
}

#未知用户
FirewallRuleSet unknown-users {
#域名已修改源码实现,直接下载的不行的...
    FirewallRule allow to baidu.com
    FirewallRule allow udp port 53
    FirewallRule allow tcp port 53
    FirewallRule allow udp port 67
    FirewallRule allow tcp port 67
}

#锁住用户
FirewallRuleSet locked-users {
    FirewallRule block to 0.0.0.0/0
}

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针对OPENWRT中WIFIDOG不稳定的优化和改进

最近在做 wifidog 的广告功能，发现 wifidog 有很多不稳定的地方，急待改进和优化。于是自习研究了 wifidog 的工作流程，结合自己的需求，简化了认证过程，流程图如下：
1.jpg

正常 wifidog 认证流程10步以上，而6次是与服务器端的直接通信。其中重复向服务器发送数据的一项可以完全省略，这样精简了认证流程可以减少4次网络传输，使每个上网用户只需要一次请求即可认证上网。认证流程优化至6步且4步是在本地通信。
注意此种方案中token的产生要在wifidog和服务器端协调一致。其实就是通过算法代替了网络认证问题。

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WiFidog编译成库

1.在package/ utils下创建wifidog_lib目录。在wifidog_lib目录下创建一个文件夹src和一个Makefile文件。Makefile文件编写内容如下：

include $(TOPDIR)/rules.mk

PKG_NAME:=wifidog_lib
PKG_VERSION:=20130917

PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)

include $(INCLUDE_DIR)/package.mk

define Package/wifidog_lib
  SECTION:=utils
  CATEGORY:=Utilities
  DEPENDS:=+iptables-mod-extra +iptables-mod-ipopt +iptables-mod-nat-extra +libpthread
  TITLE:=A wireless captive portal solution
endef

define Package/wifidog_lib/description
      The Wifidog project is a complete and embeddable captive
      portal solution for wireless community groups or individuals
      who wish to open a free Hotspot while still preventing abuse
      of their Internet connection.
endef

define Build/Prepare
      mkdir -p $(PKG_BUILD_DIR)
      $(CP) ./src/* $(PKG_BUILD_DIR)/
endef

define Build/Configure
endef

define Build/Compile
      $(MAKE) -C $(PKG_BUILD_DIR) \
           CC="$(TARGET_CC)" \
           CFLAGS="$(TARGET_CFLAGS) -Wall" \
           LDFLAGS="$(TARGET_LDFLAGS)"
endef

define Package/wifidog_lib/conffiles
/etc/wifidog.conf
endef

define Package/wifidog_lib/install
      $(INSTALL_DIR) $(1)/usr/bin
      $(INSTALL_BIN) $(PKG_BUILD_DIR)/test_wifidog $(1)/usr/bin/
      $(INSTALL_DIR) $(1)/usr/lib
      $(CP) $(PKG_BUILD_DIR)/libwifidog.so* $(1)/usr/lib/
      $(INSTALL_DIR) $(1)/etc
      $(INSTALL_DATA) $(PKG_BUILD_DIR)/wifidog.conf $(1)/etc/
endef

$(eval $(call BuildPackage,wifidog_lib))

2.解压wifidog包进入src目录

Tar xzvf wifidog-20130917-440445db60b0c3aff528ea703a828b0567293387.tar.gz –C src

3.在src下创建Makefile文件，内容如下：

LIB_VERMAJOR = 0
LIB_VERMINOR = 1
LIB_FILENAME = libhttpd.so

LIBWIFIDOG_FILENAME = libwifidog.so

OBJEXT = o

CFLAGS += -Os -pipe -mno-branch-likely -mips32r2 -mtune=34kc -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable -msoft-float

LIB_CFLAGS  = $(CFLAGS) -shared -fPIC -DPIC
LIB_LDFLAGS = $(LDFLAGS) -Wl,-soname,$(LIB_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR)
LIBWIFIDOG_LDFLAGS = $(LDFLAGS) -Wl,-soname,$(LIBWIFIDOG_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR)

wifidog_OBJECTS = src/conf.$(OBJEXT) src/commandline.$(OBJEXT)\
      src/debug.$(OBJEXT) src/fw_iptables.$(OBJEXT) src/firewall.$(OBJEXT) \
      src/gateway.$(OBJEXT) src/centralserver.$(OBJEXT) src/http.$(OBJEXT) \
      src/auth.$(OBJEXT) src/client_list.$(OBJEXT) src/util.$(OBJEXT) \
      src/wdctl_thread.$(OBJEXT) src/ping_thread.$(OBJEXT) src/safe.$(OBJEXT) \
      src/httpd_thread.$(OBJEXT) src/wifidogapi.$(OBJEXT)

wdctl_OBJECTS = src/wdctl.$(OBJEXT)

LIB_OBJ = libhttpd/protocol.o libhttpd/api.o libhttpd/version.o libhttpd/ip_acl.o

DEFS = -DHAVE_CONFIG_H
DEFAULT_INCLUDES = -I.-I..
sysconfdir = /etc
AM_CPPFLAGS += \
      -I./libhttpd/ \
      -DSYSCONFDIR='"$(sysconfdir)"'

COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
      $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
LTCOMPILE = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
      --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
      $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
CCLD = $(CC)
LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \
      $(LDFLAGS) -o $@

wifidog_LDADD = libhttpd/$(LIB_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR)

LIBS = -lnsl -lpthread


all: Makefile   libhttpd   libwifidog test_wifidog

test_wifidog: src/test_wifidog.o libhttpd libwifidog
      @rm -f test_wifidog
      $(LINK) src/test_wifidog.o $(LIBWIFIDOG_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR)  $(LIBS)

wdctl: $(wdctl_OBJECTS) libhttpd
      @rm -f wdctl
      $(LINK) $(wdctl_OBJECTS) $(wdctl_LDADD) $(LIBS)
wifidog_test: $(wifidog_OBJECTS) libhttpd
      @rm -f wifidog_test
      $(LINK) $(wifidog_OBJECTS) $(wifidog_LDADD) $(LIBS)          

libhttpd:$(LIB_OBJ) ./libhttpd/httpd_priv.h ./libhttpd/httpd.h
      $(CC) $(LIB_CFLAGS) $(LIB_LDFLAGS) $(LIB_OBJ) $(LIBS) \
           -o libhttpd/$(LIB_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR)

libwifidog:$(wifidog_OBJECTS) $(wdctl_OBJECTS) $(LIB_OBJ) ./libhttpd/httpd_priv.h ./libhttpd/httpd.h
      $(CC) $(LIB_CFLAGS) $(LIBWIFIDOG_LDFLAGS) $(LIB_OBJ) $(wifidog_OBJECTS) $(wdctl_OBJECTS) $(LIBS) \
           -o $(LIBWIFIDOG_FILENAME).$(LIB_VERMAJOR).$(LIB_VERMINOR)

.c.o:
    $(CC) $(DEFS) $(AM_CPPFLAGS) $(DEFAULT_INCLUDES) $(INCLUDES) $(CFLAGS) -MD -fPIC -DPIC -c -o $@ $<


clean:
      rm -f  $(LIB_FILENAME)*
  1. 修改src下对应的源代码，同时把scripts/init.d/wifidog脚本提供的功能通过lib库提供,这样 lib库需要提供int wifidogstart()，int wifidogstop()，int wifidogreload()，int wifidogrestart()。make package/wifidog_lib/compile V=s进行编译生成libwifidog.so.0.1和测试程序test_wifidog

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